WO2021154167A1 - Four ménager comprenant un couvercle de paroi arrière sur moufle - Google Patents

Four ménager comprenant un couvercle de paroi arrière sur moufle Download PDF

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Publication number
WO2021154167A1
WO2021154167A1 PCT/TR2020/050058 TR2020050058W WO2021154167A1 WO 2021154167 A1 WO2021154167 A1 WO 2021154167A1 TR 2020050058 W TR2020050058 W TR 2020050058W WO 2021154167 A1 WO2021154167 A1 WO 2021154167A1
Authority
WO
WIPO (PCT)
Prior art keywords
rear wall
cover element
projection
connection
extension
Prior art date
Application number
PCT/TR2020/050058
Other languages
English (en)
Inventor
Musa DEMIRBAS
Erdem EROGLU
Ogun DUZGUN
Yahya AKKUS
Original Assignee
Femas Metal San. Ve Tic. A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Femas Metal San. Ve Tic. A.S. filed Critical Femas Metal San. Ve Tic. A.S.
Priority to EP20916949.9A priority Critical patent/EP4062109B1/fr
Priority to PCT/TR2020/050058 priority patent/WO2021154167A1/fr
Publication of WO2021154167A1 publication Critical patent/WO2021154167A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/325—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation electrically-heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread

Definitions

  • the present invention relates to domestic ovens having an oven muffle delimiting the cooking chamber, particularly to an oven comprising a cover element covering a fan provided at the rear wall of the muffle.
  • a fan In domestic ovens that can cook with convection, there is a fan that provides hot air circulation on the rear wall of the muffle surrounding the cooking chamber.
  • a cover element In order to protect the fan from external factors, for example oil and steam scattered during cooking, there is provided a cover element on which a fan protecting sheet is formed.
  • Cover element has the structure of metal sheet on which there are air outlet holes and it is fixed to the rear wall of the muffle by means of the screw connections located at its corners.
  • EP2372256A1 discloses an oven muffle comprising a muffle wall having a mounting region for a fan and a plurality of through holes provided in the perimeter of the mounting region for insertion of connecting screws, and a cover element for said mounting region comprising a plurality of lugs having openings which overlap with through -holes of the muffle wall extending from cover element towards the muffle wall so as to maintain the cover element at a distance to muffle wall.
  • individual extensions and muffle wall provided on the cover element have shallower and softer surface geometries for facilitating the production.
  • extensions and rear wall of the muffle extend parallel to each other.
  • the object of the invention is to facilitate the mounting of the cover element of an oven that comprises an oven muffle having a fan and provides fan protection, to the rear wall.
  • the invention relates to a domestic oven, comprising a muffle having a flat rear wall and lateral walls extending perpendicularly from opposite lateral edges on the rear wall, a cover element made of flat metal sheet fitted on the rear wall from a mounting portion to define a chamber that contains a circulation fan between rear wall and the cover element, and a first removable connection element formed by a projection provided on the rear wall in the mounting portion and a corresponding extension to be inserted on the cover element.
  • facing walls of the projection and extension contacting each other are arranged in an inclined form such that they will include an angle of inclination relative to the plane of the rear wall.
  • the first connection element which is angled at the angle of inclination with the rear wall, provides alignment by simply pushing the cover element towards the rear wall and it becomes possible to fix the projection on the extension for example simply by screwing. This is achieved by making insertion in place easier due to the fact that the angle of inclination distributes the force applied to the cover element in the pushing direction with its component in the axial direction.
  • connection element having the form of a mirror-symmetry relative to an axis passing through the middle of the first connection element and the rear wall.
  • the second connection element creates force components that push in bidirectional by holding the cover element close to the middle portion and pushing it perpendicularly towards the rear wall and provides that the cover element is promptly fastened to the rear wall through the projection.
  • the projection in the first connection element and second connection element is self-formed by forming the outside portion on the rear wall. In this way, a projection is formed during the forming of the muffle, without the need for an additional projection to be mounted on the rear wall.
  • the extension in the first connection element and second connection element is self-formed by forming the inside portion by bending the cover element inward.
  • an extension is obtained by forming the metal sheet.
  • the inward bending expression applies if the direction viewed after mounting on the cover element is taken outside.
  • an extension is formed in the interior with a depression form.
  • the extension running outwards from the plane on which the cover element extends enables the cover element and a distant element, for example the projection outward from the rear wall, to reach each other.
  • the projection and the extension together act as a spacer.
  • the spacer provides a chamber between the cover and the rear wall, and elements such as fan and resistor are placed in this chamber.
  • the portion of the projection facing an outer circumferential edge comprises a raised bending portion so as to provide the angle of inclination.
  • the raised bending is obtained by forming the projection in an asymmetrical structure during cold forming. As the outward facing portion is located to be high, and the opposite inward facing portion is located to below in the projection, an angle of inward inclination is obtained.
  • first connection element and the second connection element are provided on cover element at the corner portions in opposite directions to each other. This allows cover element to be mounted to rear wall from the corners. Since the corners are the regions where thermal deformations are most affected, the cover element is allowed to be securely attached to the rear wall by the first and second connection elements.
  • the extension comprises an outer connection hole that is thoroughly opened and the corresponding projection comprises an inner connection hole arranged to be aligned with the outer connection hole.
  • the inner and outer connection holes allow the cover element to be fixed to the rear wall, for example by inserting a screw, by forming a connection hole from the cover element to the rear wall.
  • a preferred embodiment of the invention comprises a sleeve extending perpendicular to the rear wall surrounding the inner connection hole.
  • the sleeve gives enough space for the screw threads to fit into the hole.
  • the angle of inclination is set to be as maximum 10°.
  • the preferred value is 5°. This angle range is considered to be sufficient in that it provides an effective engagement of the extension and the projection to each other respectively in both cover element made of metal sheet and rear wall by causing minimum deformation
  • the extension is in a form of the inclined conical cup with top portion is a flat outer connection wall with the angle of inclination.
  • Figure 1 is a perspective view of a representative embodiment of the domestic oven of the invention with oven muffle demounted.
  • Figure 2 is a front view of a representative embodiment of a muffle used in the oven of the invention with cover element removed.
  • Figure 3 is a cross sectional view of the first connection element located at the muffle shown in Figure 2.
  • Figure 4 is a cross sectional view of the second connection element located at the muffle shown in Figure 2.
  • FIG 1 a representative embodiment of a muffle (1) of a domestic oven of the invention is shown in top perspective.
  • the muffle (1) comprises a rear wall (20) made of a flat planar metal sheet bent in U-shape and a lateral wall (24, 28) extending from both sides thereof.
  • a circulation fan (50) and a resistor (60) surrounding it are located in a central middle portion (26) of the rear wall (20).
  • the circulation fan (50) is rotatably driven from the rear of the muffle (1) by a fan motor (not shown) having a shaft passing through a hole located in the middle portion (26).
  • the terminal ends of the circular resistor (60) surrounding the circulation fan (50) pass through the holes located on the rear wall (20) near the outer edge (21).
  • a channel of the circular form centered on the middle portion (26) is formed on the rear wall (20). This form increases the resistance of the rear wall (20) against heat and thermal stresses from the resistor (60).
  • a mounting region is provided at each corner of the rear wall (20).
  • the mounting region includes a planar upper mounting portion (23) around a projection (34) near the upper corner of the rear wall (20) and a planar lower mounting portion (25) around a projection (44) near to its lower corner.
  • a ventilation opening (15) is formed by opening multiple adjacent holes in the central middle portion of a cover element (10) obtained by forming from a flat metal plate.
  • the cover element (10) is approximately equal in size and form with the rear wall (20).
  • the orifices (32, 42) are in the form of a circular opening.
  • FIG 2 shows the front view of the muffle (1 ).
  • the muffle (1 ) has a metal sheet base (2) and a top (3) adjacent to the rear wall (20) and the lateral walls (24, 28).
  • the outer edge (21) of the rear wall (20) has the form of a rectangle.
  • An annular bearing (22) provided in the middle portion (26) ensures that the circulation fan (50) is fixed on the rear wall (20).
  • a curved portion (29) with rectangular-like borders is formed on the rear wall (20) at an inward distance from the outer edges (21).
  • the cover element (10) is mounted, the curved portion (29) provides the distance between the cover element and the rear wall (20) and increases the resistance against thermal stresses.
  • a first connection element (30) is placed in the upper mounting portion (23) of the rear wall (20), on the other hand, a second connection element (40) is placed in the lower mounting portion (25).
  • Pockets (27) are provided in the transverse direction inside the curved portion (29).
  • the inlet portion of the extension (31) of the first connection element (30) on the cover element (10) is structure of the circular orifice (32). With the narrowing of the orifice
  • the planar outer connection wall (36) is obtained.
  • a circular outer connection hole (33) is drilled in the middle center of the outer connecting wall (36).
  • a sleeve (39) is obtained by bending the outer connection hole (33) from its peripheral edges inwards.
  • a projection (34) form is formed such that the rear wall (20) is asymmetrically depressed to have a raised bending portion (38) outward at the top and a lowered bending portion at the bottom.
  • the outer diameter of the projection (34) and the outer diameter of the projection are approximate to each other.
  • the end portion of the projection (34) comprises a flat inner connection wall (35) that abuts the outer connection wall (36) and is wider than the outer connection wall (36).
  • An inner connection hole (37) narrower than the outer connection hole (33) is drilled in the middle of the inner connection wall (35).
  • a short sleeve structure is formed by bending the inner connection hole (37) in the opposite direction to the extension direction of the projection (34).
  • the outer connection hole (33) and the inner connection hole (37) are coaxial.
  • the inner connection wall (35) and the outer connection wall (36) have an inclination angle (a) of 5° relative to the extending plane of the rear wall (20) along the plane where they make frontal contact.
  • the inner connection wall (35) and the outer connection wall (37) are angled towards the inside of the muffle (1).
  • the sleeve (39) is aligned perpendicular to the rear wall (20). In this case, when the cover element (10) is mounted on the rear wall (20), an operator facing the muffle (1) can easily place the mounting screw (not shown) to sleeve (39) in way to be perpendicular to the rear wall (20) without any angle.
  • the second connection element (40) is shown by taking a cross section in the mounting condition.
  • the second connection element (40) has mirror symmetry with the first connection element (30) according to the horizontal axis shown in Figure 2 and dividing the rear wall (20) into two from the middle. In this way, the second connection element (40) provides an inward inclination with the angle of inclination (a) facing into the muffle (1).
  • An extension (41) is formed by bending the cover element (10) made of metal sheet in the form of a truncated cone.
  • the inlet portion of the extension (41) of the second connection element (40) on the cover element (10) is structure of the circular orifice (42).
  • the planar outer connection wall (46) is obtained.
  • a circular outer connection hole (43) is drilled in the middle center of the outer connecting wall (46).
  • a sleeve is obtained by bending the outer connection hole (43) from its peripheral edges inwards.
  • a projection (44) form is formed such that the rear wall (20) is asymmetrically depressed to have a raised bending portion (48) outward at the bottom and a lowered bending portion at the top.
  • the outer diameter of the projection (44) and the outer diameter of the projection are approximate to each other.
  • the end portion of the projection (44) comprises a flat inner connection wall (45) that abuts the outer connection wall (46) and is wider than the outer connection wall (46).
  • An inner connection hole (47) narrower than the outer connection hole (43) is drilled in the middle of the inner connection wall (45).
  • a short sleeve structure is formed by bending the inner connection hole (47) in the opposite direction to the extension direction of the projection (44).
  • the outer connection hole (43) and the inner connection hole (47) are coaxial.
  • the inner connection wall (45) and the outer connection wall (46) have an inclination angle (a) of 5° relative to the extending plane of the rear wall (20) along the plane where they make frontal contact.
  • the inner connection wall (45) and the outer connection wall (47) are angled towards the inside of the muffle (1).
  • the sleeve is aligned perpendicular to the rear wall (20). In this case, when the cover element (10) is mounted on the rear wall (20), an operator facing the muffle (1) can easily place the mounting screw (not shown) to sleeve in way to be perpendicular to the rear wall (20) without any angle.
  • connection element (30) As the first connection element (30) is positioned transversely with the second connection element (40), it is sufficient for the operator to push the cover element (10) forward when the cover element (10) is to be mounted.
  • the outer connection holes (33, 43) are aligned while the cover element (10) is inserted on the end walls between the opposite outer connection walls (36, 46) and the inner connection walls (35, 45) by means of the upward angle of inclination (a) of the second connection element (40) from the bottom and downward angle of inclination (a) of the first connection element (30) from the top.
  • the mounting of the cover element (10) to the rear wall (20) is completed by screwing through the outer connection holes (33, 43).
  • the extension (31) and the projection (34) ensure a distance (L) between the cover element (10) and the rear wall (20) to provide a chamber in which the circulation fan (50) will fit. Also, the mounting of the cover element (10) to the rear wall (20) is easier with the angle of inclination (a) between the extension (31) and the projection (34).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

L'invention concerne un four ménager comprenant un moufle (1) ayant une paroi arrière plate (20) et des parois latérales (24, 28) s'étendant perpendiculairement depuis des bords latéraux opposés sur la paroi arrière (20), un élément couvercle (10) constitué d'une feuille métallique plate montée sur la paroi arrière (20) à partir d'une partie de montage (23, 25) pour définir une chambre qui contient un ventilateur de circulation (50) entre une paroi arrière (20) et l'élément couvercle et un premier élément de raccordement (30) formé par une saillie (34) disposée sur la paroi arrière (20) dans la partie de montage (23, 25) et une extension correspondante (31) destinée à être insérée sur l'élément couvercle (10). Dans le four, des parois en vis-à-vis de la saillie (34) et de l'extension (31) en contact l'une avec l'autre sont agencées sous une forme inclinée, de telle sorte qu'elles comprennent un angle d'inclinaison (a) par rapport au plan de la paroi arrière (20).
PCT/TR2020/050058 2020-01-29 2020-01-29 Four ménager comprenant un couvercle de paroi arrière sur moufle WO2021154167A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20916949.9A EP4062109B1 (fr) 2020-01-29 2020-01-29 Four ménager comprenant un couvercle de paroi arrière sur moufle
PCT/TR2020/050058 WO2021154167A1 (fr) 2020-01-29 2020-01-29 Four ménager comprenant un couvercle de paroi arrière sur moufle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2020/050058 WO2021154167A1 (fr) 2020-01-29 2020-01-29 Four ménager comprenant un couvercle de paroi arrière sur moufle

Publications (1)

Publication Number Publication Date
WO2021154167A1 true WO2021154167A1 (fr) 2021-08-05

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ID=77079791

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PCT/TR2020/050058 WO2021154167A1 (fr) 2020-01-29 2020-01-29 Four ménager comprenant un couvercle de paroi arrière sur moufle

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EP (1) EP4062109B1 (fr)
WO (1) WO2021154167A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1464898A1 (fr) * 2003-03-31 2004-10-06 BSH Bosch und Siemens Hausgeräte GmbH appareil de cuisson
EP1467154A2 (fr) * 2003-04-10 2004-10-13 Samsung Electronics Co., Ltd. Appareil de cuisson
DE102006004384A1 (de) * 2006-01-31 2007-08-16 BSH Bosch und Siemens Hausgeräte GmbH Gargerät, insbesondere Hocheinbau-Gargerät, und Verfahren zum Herstellen einer Muffel für ein Gargerät

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4430065B4 (de) * 1994-08-24 2006-07-06 BSH Bosch und Siemens Hausgeräte GmbH Blechelement vorzugsweise eines Hausgerätes
EP2372256B1 (fr) * 2010-03-31 2016-09-07 Electrolux Home Products Corporation N.V. Moufle de four et four comportant ce moufle
ITTO20130852A1 (it) * 2013-10-18 2015-04-19 Indesit Co Spa Apparecchio di cottura domestico

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1464898A1 (fr) * 2003-03-31 2004-10-06 BSH Bosch und Siemens Hausgeräte GmbH appareil de cuisson
EP1467154A2 (fr) * 2003-04-10 2004-10-13 Samsung Electronics Co., Ltd. Appareil de cuisson
DE102006004384A1 (de) * 2006-01-31 2007-08-16 BSH Bosch und Siemens Hausgeräte GmbH Gargerät, insbesondere Hocheinbau-Gargerät, und Verfahren zum Herstellen einer Muffel für ein Gargerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4062109A4 *

Also Published As

Publication number Publication date
EP4062109B1 (fr) 2024-06-05
EP4062109A4 (fr) 2023-08-02
EP4062109C0 (fr) 2024-06-05
EP4062109A1 (fr) 2022-09-28

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